A combined testing system and method for an electric drive system and a power battery system

Abstract

The invention discloses a combined test system and method of an electric drive system and a power battery system, which uses the electric efficiency η ed , power generation efficiency η pg and the available discharge power P of the power battery system dischar , available charging power P char , calculate the maximum electric power P that the power battery system allows the motor to run ed and the maximum generating power P pg , and converted into the maximum electric torque T that the power battery system allows the motor to run ed and the maximum generating torque T pg , according to T ed , T pg with the preset motor electric torque design value T des1 , Motor generating torque design value T des2 The comparison results limit the electric torque and power generation torque, which avoids the problem of over-discharging or over-charging the battery due to the difference in intermediate conversion efficiency, avoids battery damage, and ensures the joint test of the power battery system and the electric drive system The normal development, and also ensure the accuracy of the test results.

Description

technical field [0001] The invention belongs to the field of electric drive system testing, and in particular relates to a combined test system and method for an electric drive system and a power battery system. Background technique [0002] With the gradual maturity of domestic new energy vehicle research and development, the testing and verification technology for electric drive systems and power battery systems of new energy vehicles has become relatively mature. Electric drive system and power battery system are the core power systems of new energy vehicles. At present, there is no simple and effective method to test the cooperation between the two systems. If the vehicle controller is used to control the two systems, then It is necessary to shield a large number of useless control logic or signal detection on the vehicle controller. The process is complex and time-consuming, and it is impossible to effectively reproduce the coordination problem between the battery and t...

AI Technical Summary

Problems solved by technology

The electric drive system and power battery system are the core power systems of new energy vehicles. At present, there is no simple and effective method to test the cooperation between the two systems. If the vehicle controller is used to control the two systems, then It is necessary to shield a large number of useless control logic or signal detection on the vehicle controller. The process is complicated and time-consuming, and it is impossible to effectively reproduce the coordination problem between the battery and electric drive under a certain working condition.

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